Ignition-arch for furnaces.



W. M. DUNCAN. IGNITION ARCH IOR PURNAGES.

APPLICATION FILED MAY'G, 1909.

Patented May 17,1910.

2 SHEETS-SHEET 1.

Patented May 17,1910.

2 SHEETS-SHEET 2.

Humm HHIH W.' M. DUNCAN.

Il l

inra sfrfrs ramena onirica.

WILLIAM MILLEN DUNCAN, OF ALION, ILLINOIS.

IGNITION-ARCH FOR FURNACES.

To all 'whom it may concern:

Be it known that I, WILLIAM M. DUNCAN, a citizen of the United States of America, residing at Alton, county of Madison, and State of Illinois, have invented certain new and useful Improvements in Ignition-Arches for Furnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specication.

My invention relates to an ignition arch for use in furnaces, and more particularly intended for use in furnaces supplied with mechanical stokers, the invention having for its object the production of an ignition afch and supports therefor that may be readily and (uickly mounted and which will remain in p ace after mounting without the employment of fastening means, thereby also permitting of the ireproof sections of the ignition arch being readily separated from their hangers and replaced by new reproof sections, in the event of their becoming impaired by service.

Figure I 1s 1n part a longitudinal vertical section through portions of a furnace and my ignitionvarch, and in part a side eleva-V tion of a mechanical stoker preferably employed in the furnace in which my ignition arch is used. Fig. II is a side elevationof my ignition arch. Fig. III is a vertical longitudinal section through my ignition arch on line III-IIL Fig. II. Fig. IV is a top or plan view of a portion of the ignition arch.

In the accompanying drawings A designates the front wall of a -furnace beneath which my ignition arch to be hereinafter described is located. B is the frame of a mechanical Stoker havin at its front end a hopper C. The stoker frame is preferably mounted upon rails D that are operable upon a track E, thereby allowing of the stoker being moved outwardly and inwardly relative to the re chamber of the furnace.

1 designates beams preferably ha ving their upper portions seated in the front wall of the furnace and their ends mounted upon an arch a see Figs. III land IV,) at the interior of t e furnace next to the side walls of the re chamber. The supporting beams are held separated from each other to a desired degree by distance pieces 'ifl located between the end portions of said beams, (as seen in Figs. II and IV.) Each supporting beam 1 is provided at its outer side and near Specification of Letters Patent.

Application filed May 6, 1909.

Patented May f7, iQfO. seria-1 No. 494,342.

its lower edge with lugs or seats 2 separated from each other to provide gaps?) between them, and which are adapted to' receive hangers to be next referred to.

a designates av series of hangers thatare supported by thesupporting beams lv and extend transversely beneath the supporting beams. Each hanger 4,'with the exception of the hangers at the ends ofthen ignition arch, is provided at itsbottom with double -flanges 5, (as seen'in Figs. `II to IV, inclusive.) The side hangers are provided with single flanges 5', (seeA Fig. III.) Each hanger is provided with arms 7 which form pockets 6 in its upper portion. In mounting the hangers 4 upon the supporting beams 1, the hangers arek placed beneath the support= ing beams and then moved upwardly so that the arms 7 are passed through gaps 3 between adjacent lugs 'orseats of the supporting beams, after which the hangers are shifted laterally with the result of carryingv` the arms 7 into positions above lugs or seats 2 in order that they may rest thereon without attachment to the supporting beams, and act to support kthe hangers.l The act of mounting the hangers is, therefore, rendered a very simple one, and it is obvious that they may be dlsmounted with the same ease' as they are mounted.

8 designates a plurality of heat'radiating blocks that are'suspended' from the hangers 4, these blocks being preferably of reclay or other material that will stand the action of heat in a furnace iire chamber and will serve to radiate the heat received thereby.

These heat radiatingl blocks are provided-v near their upper ends with side'grooves 9 located opposite to eachother in eachblock, whereby the blocks are furnished with T heads that rest'upon the flanges 5 and `5 of the hangers due to the entrance of .these flanges into the grooves in the blocks.

As will be seen on reference to Fig.I, the hangers 4 extend longitudinallyof thel yfurnace and inasmuchas there'is af'series of these hangers extending entirely vacross the width of the fire chamber, said `hangers provide supports for Vseveral'rowsfof radiating blocks 8 extending longitudinally of the furnace, and also a plurality of rows 'of blocks extending in a direction'transversely-fof-the furnace. l" Q To provide for the mounting of my ignition arch, the supporting beams l are first mounted in the furnace and spaced apart in llo the manner hereinbefore described. One of the side hangers 4 is rst 1put in place so' that its arm 7 w l rest u on ugs or seats 2 at a side of the furnace re chamber, a suitable support bein placed at the side of the furnace fire amber. The heat radiatin blocks 8 that areto be in part suspended from the side hanger that 'has been mounted are placed upon said sup ort so that side grooves thereln will be received by the fiange 5' of the hanger. The hanger 4 that is to occupy a position next adjacent to the side hanger is then put in place so that its supportmg arm 7 will rest upon the lugs or seats of the supportin beams provided to receive said arms, and t' is hanger is shifted horizontally so `that its flange 5 facing the flange .5' of the side hanger 4 will enter into the grooves in the sides of the previously posi tioned heat radiating blocks. A second row of heat radiating blocks is then placed upon the support for the blocks and moved horizontally until they are positioned against the out the een described, it is possible to arran e the heat ra` diating blocks in close assemb age inasmuch as the hangers are shiftable toward each other on the supporting seats of the beams 1, and that consequent the' combined assembled heat radlatin blocks constitute practically a solid arch t(body Without objectionable interstices between the blocks. It is obvious that if the blocks to be introduced to comprise the lest Irow of blocks in the arch are of'a thickness that will not permit of their bein readily inserted when the remainder of tie members of the arch have been put in place, the blocks to be mounted in this row ma be chi ped to the necessary degree to permit of their introduction. 4

In the event of any one or more ofthe radiating lblocks becoming impaired so as to render it unserviceable in the ignition arch, said block, or blocks, may be readily removed from the hanger by whichy it is supported by thel simple act of slipping it from the hanger, it being evident that if the block, or blocks, in front of the impaired one remain serviceable, it or they may' be replaced Vin former position after a new block has been substituted upon the hangerl for the one that has been removed due to im vairment thereof.

claim:

1 In an ignition arch for furnaces, a sup- -porthaving seats projecting from opposite lsaid gaps and then moved'laterally to' a position of. rest upon said seats, anda plurality of heat radiating sections suspended from said hanger.

3. In .an ignition arch for furnaces, a support having integral therewith and project ing horizontally therefrompairs of o po* sitely disposed seat lugs spaced apart rom each .other to provide gaps between them, a hanger susceptible of being passed upwardly between said gaps and then moved laterally to rest upon a pair of said seat lugs, the hanger being provided Iat its sides with flanges, and rows of heat radiating sections having grooves in which the fianges of said hanger are seated.

4. In an ignition arch for furnaces, a support having rigid seat lugs extending horizontally from each of its sides, said lugs being spaced apart to provide. aps between them, a hanger provided wit `arms each forming a pocket in thev upper portion of said hanger, the arms being adapted to be moved upwardly through the gaps between said lugs. and to be positioned on the lugs,

and heat radiating sections suspended from said hanger.

5. In an ignition arch for furnaces, a pair of supporting beams each havin at its side farthest removed from the other @am a plurality of rigid seats extending horizontally from the beam and spaced apart to provide gaps between them, hangers susceptible of elng moved upwardly beneath said beams and havin portions adapted to rest upon said seats or the suspension of the hangers, I

and heat radiating sections suspended from said hangers.

VVLLIAM' MLLEN DUNCAN.

4 In the presence ofW J. N. CRAWFORD, WALTER L. J U'rrEMEYER. 

